Abstract: Disclosed are an electric energy storage device having a good cycle characteristic and a temperature characteristic and a method of charging and discharging the electric energy storage device. The electric energy storage device including a capacitor and a secondary battery combined in series is provided. When the capacitor of the electric energy storage device is an electric double layer capacitor, the capacitor is used to the voltage of OV or less to increase an available energy usage.

Abstract: A method is provided of manufacturing an electrode for an electric double layer capacitor, including mixing an active material, a conductive material and a binder. In this method, Ketjen Black is used as the conductive material and a fluorosurfactant is an additive for enhancing fluidity of the slurry. Also, an electrode for an electric double layer capacitor and an electric double layer capacitor using the electrode are provided. Use of the electric double layer capacitor increases the amount of the active material, so that the electrical capacitance is increased, thus providing the electric double layer capacitor in which the amount of the conductive material is decreased and the electrical resistance is decreased.

Abstract: The present invention relates to an apparatus and a method for producing hydrogen gas. The hydrogen gas production apparatus of the present invention comprises a) a dielectric hollow tube, b) a means for maintaining the dielectric hollow tube to a reduced pressure, c) a microwave source that generates a microwave, d) a waveguide coupled to the microwave source that applies the microwave to the dielectric hollow tube, e) a gas supply source that supplies a hydrogen element-containing gas into the dielectric hollow tube, wherein the hydrogen element-containing gas supplied into the dielectric hollow tube undergoes plasma discharge with aid of the microwave from the waveguide and produces reaction products including hydrogen gas through intramolecular bond breakage rather than heat decomposition, by collision of an electron produced by the plasma discharge with the hydrogen element-containing gas, and f) a separator that separates the hydrogen gas from the reaction products.

Abstract: Disclosed are an electric energy storage device having a good cycle characteristic and a temperature characteristic and a method of charging and discharging the electric energy storage device. The electric energy storage device including a capacitor and a secondary battery combined in series is provided. When the capacitor of the electric energy storage device is an electric double layer capacitor, the capacitor is used to the voltage of OV or less to increase an available energy usage. When this energy storage device is used as a power in a place where a rapid keeping and repairing is difficult such as out in the fields including in the mountain, at the sea, on the road, the cost for keeping and repairing can be largely reduced.

Abstract: In a safety vent part and an electric energy storage device having the same, the safety vent part includes a plate coupled to the device, a metal sheet and a metal cap. A hole having a step portion is formed through the plate, and is in communication with an interior of the device. The metal cap having an exhaust nozzle corresponding the hole is coupled into the step portion by a tight fit. The metal sheet is disposed between a bottom surface of the step portion and the metal cap. When an internal pressure of the device is higher than a predetermined breaking pressure, the internal pressure of the device breaks the metal sheet. A gas generated abnormally in the device is exhausted through the hole and exhaust nozzle.

Abstract: An the electric energy storage device includes a cylindrical rolling up electrode body, a cathode lead connecting plate, an anode lead connecting plate, a terminal plate, and a container. The rolling up electrode body includes a cathode and an anode leads formed by cathode and anode collectors. The cathode and anode leads are separately extended from one side of the rolling up electrode body. The terminal plate includes a cathode lead connecting plate, an anode lead connecting plate and an insulation combing member for integrally combining the cathode lead connecting plate with the anode lead connecting plate. The container receives the rolling up electrode body. The electric energy storage device may be advantageously connected to another electric energy storage device in serial or parallel. Additionally, the electric energy storage device has some advantages such as reduced volume, enhanced convenience, improved productivity, etc.

Abstract: In a safety vent part and an electric energy storage device having the same, the safety vent part includes a plate coupled to the device, a metal sheet and a metal cap. A hole having a step portion is formed through the plate, and is in communication with an interior of the device. The metal cap having an exhaust nozzle corresponding the hole is coupled into the step portion by a tight fit. The metal sheet is disposed between a bottom surface of the step portion and the metal cap. When an internal pressure of the device is higher than a predetermined breaking pressure, the internal pressure of the device breaks the metal sheet. A gas generated abnormally in the device is exhausted through the hole and exhaust nozzle.

Abstract: An electric energy storage device for reducing electric resistance between the anode/cathode electrodes and their terminals is disclosed. In the electric energy storage device, an anode electrode and a cathode electrode are stacked to have offset areas with predetermined margins and an insulating film is inserted therebetween. And, the stacked electrodes between which the insulating film is inserted is rolled up so as to form an electrode body. A plate type anode terminal and a plate type cathode terminal which have the thread-like unevenness at their bottoms are connected to a top and bottom of the rolled electrode body respectively. A metal layer is formed on both contact areas of the anode and cathode electrodes by plasma or arc spray.

Abstract: Disclosed is an electric energy storage device having a large capacity and includes a thin active material layer and a plurality of integrated electrodes. The electric energy storage device comprises at least one electrode group in which a cathode, a separator and an anode are in regular sequence, repeatedly integrated and wound into a plate shape. The electrode group has lead lines collected at a predetermined place for a connection with a terminal. Since the cathode and anode are wound with the insertion of the separator between them, the increase of the number of the lead lines is advantageous. In addition, the lead lines can be preferably formed by cutting each portion of the electrode at once by utilizing an apparatus such as a press, the manufacture of the electric energy storage device having a large capacity is advantageous.

Abstract: An electric energy storage device for reducing electric resistance between the anode/cathode electrodes and their terminals is disclosed. In the electric energy storage device, an anode electrode and a cathode electrode are stacked to have offset areas with predetermined margins and an insulating film is inserted therebetween. And, the stacked electrodes between which the insulating film is inserted is rolled up so as to form an electrode body. A plate type anode terminal and a plate type cathode terminal which have the thread-like unevenness at their bottoms are connected to a top and bottom of the rolled electrode body respectively. A metal layer is formed on both contact areas of the anode and cathode electrodes by plasma or arc spray.

Abstract: The present invention relates to a sealed high-density on-line measuring device for spectrophotometer whose cuvette holder is linked to a reactor, which comprises a base; a fixed plate for light passage, which is vertically placed on the base; a moving plate for light radiation, which is vertically placed on the base at an opposite side to the fixed plate so that it can slide on the base horizontally; inlet and outlet for sample passage, each of which is positioned at outer side of the moving plate; a metal ring linking the fixed plate and the moving plate; and, upper and lower shielders each of whose ends is in contact with the fixed plate and moving plate, respectively, to give a sealed space. In accordance with the scaled on-line measuring device of the invention, high concentrations of samples in solutions can be measured without dilution, by way of employing a newly designed cuvette holder in a spectrophotometer fitted to a reactor.